Means for molding rubber draining boards for sinks



4 1 1,688,232 J. P. HARKIN MEANS FORMOLDING RUBBER DRAINING BOARDS FOR SINKS 3 Shee-ts-Sheet l Filed only 2, 1926 wur:

l Oct. 13, 1928.

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J. P. HARKN MEANS FOR MOLDING RUBER DRAINING BOARDS FOR SINKS Filed July 2, 1926 3 Sheets-Sheet 5 /N VE /V T02 JAMES ,0. Hmz/mv 4 Trae/VE YS superseded.

Patented @et "i6, QZS.

unirse STATES Q y JAMESi'PAUL HARKBLUF MEANS FOR- MOLDING RUBBER Application filed Ju1y;2,

My 'invention relates to improvements in thefproduction ot' rubber draining boards for sinks and'nieans for molding the same and generally for preventing the unsanitary condition of sinks and' receptacles. The

Words rubber draining boards Vwhen used` in this specification reiler to an article cast or formed by molding or pressing rubber or coinposition and having special qualities and advantages hereinafter referred to. An ob jectv ot the invention is to produce economically diiterenteilicieiit rubber draining boards by means otonoI apparatus ivith `ad justmcnts to varyfthe size and shape of the boards.v Another'object of the invention to produce rubber draiiiingboards with a sink Well.' either oval, square, oblongl or other shape. Another object is to produce rubber draining boards having` ythe major portion on the rightor lefthand'ot the Well. A rightihand lboaid means a board in which the main area.' isV on'the lett hand from thel point of View of the onlooker. Another. object concerns the `provision of means Where by all the parts ot the apparatus can be easilylassembled for operation and dismantled i'or alterations. ln all of these 1 respects the means and method of inoldingare hereinafter 'fully explained. lflith the above and other objects in view the inventiony consists in' gener-alot certain novel 'points ot construction and combinationsof'parts hereinafter fullyy described and illust ated in the accompanying drawing and 'specifically claimed. y

The invention relates` particularly toidrainl ing `boards to be formed .o-riibber.or likek material akin to rubber, as applied-to household or industrial sinks or like appliances.

ln all cities and places Where Water supply service is available there is. extensivefuse made of 'means and appliances for Washing, cook-ing and other purposes, `and for carry-` ing away the Waste Water by means of sinks and pipes. In a greatinajority of cases a drainingboard is used in connection with suoli sinks, being tormedc-f anpoblong or square orotlier tray shape and composed lot Wood boards, or partly oi' Wood and partly ot other material. The term rubberdraiin ing board "as herein applied to the product. of this invention mustbe distinguished troni.,

tliewvood or other boards at present joinedV together in use for sinks, and which'onaccouiit of their unsanitary effects-are. to bek it Well known in connection with suchconstructions around 'sinks andthe Trionivnun,"'Ansrnfiniin naaiivino roanne non sINKs.

icas.. serial No. 120,162.

like that through constant wetting the component Wood boardsor parts become morek or lessA Warped, andlconsequent thereon condi-` tions become `unsaiiitary owing to moisture and dirt accumulating .under and between the adjacentivalls and iny crevices and ifran'i ing, thereby requiring in some positionsthe unsightly and inconvenient use of lead flashing or other troublesome expediente as a cure or preventive. It Will be understood thatin research.laboratories Wherev acids .are han-v dled my rubber draining board 'or sink cover becomes especially valuable in overcoming the difiiculties described. Y

My invention relates to a sink top or drain board so formed and iiiolded'ot' a. resilient and inoldable material such asrubber or of a like material akin to rubber thatiit will prevent or minimize the objectionable and un-v sanitary conditions heretofore described. The new rubber draining board is niade'in forms either right or lett handpatter or both', With all necessary grooves leading `in angular ry other direction to' the sink well. There is attached or attaoliable for the top of the sink', a narrowniolded skirting ot rubber integral with the draining board and turning atrriglit angle in' a continuous up- Wardv direction and constituting orproviding aclose joint4` around those parts of theV Wall which itis in contactlivith. The other end and .the iront (not iii Contact with the Walls) areniolded with skirting in a downward di-y rectionso that they liton to and over any, framing employed. The rubber draining boardfis so molded that it turns ina down,

Ward directioninto the vWellin one continuous lip making a close shield against the sides of4 the; sinltwell and thereby rendering itimpossible oraiiy moisture or dirtto collect` thereunder. y

The invention maybe manufactured in various colors to toneivith other surroundings. and invarious sizes to suit sinks ot different sizes. ltxvvill bel understood however that a large.proportion-'ot the drain boards can be fashioned to usual standard style and stocked by merchants accordingly with greatadvfantagetoall concerned. is it is-necessary to have the rubber draiiiiiigbo'ards' produced with the major portion otthesame sometimes on. the rightor sometimes lon the lei't'handvside fofthe sink Well or sometimes with the well centrally situated provision is madeY to economically produce my rubber draining;

board for all three positions,

In the accompanying drawings like characters of reference indicate like parts in the severalviews.

Figures 1, 2, 3 are respectively plan view, longitudinal cross section and transverse cross section of the upper and lower dies or molds.

Figures 4 and 5.are respectively longitudik nal and transverse cross sections of a modification of the dies adaptable forinolding either right or left hand boards.

Figures 6 and 7 respectively are transverse and longitudinal cross sections of mold for producing as separate pieces the skirtings.

v'Figure 8 is a cross section of the mold for producing as separate members the corner pieces of the wall skirtings.

- Figure 9 is a inodilicat'on of my combination mold in longitudinal .cross section for the production Of right hand, left hand or even handed boards.

Figures 10,.11,'12, 13 and 14 and 15, show ksections ofdetachable stop bars which are which boards are mounted; cavity 26 is the space wherein the rubber is cast for the skirting that extends into the sink well; cavity represents the space wherein is formedv the table-like rubber carrying the drainage grooves 27. I have for the sake of convenience in description designated the form of moldillustrated in Figure 1, a left hand mold, from the fact that the wallcavities shown by numerals 37 and 26 are located to the right of such mold. In further reference when these cavities (numerals 37 and 26) are located-to the left, suoli mold will be referred to as a right hand mold and when the cavity 26 is located central the mold willbe ieferred to as a central or evenhanded mold. t

It will Vbe seen that my invention provides thenieans of producing the three above referred to forms of drainage boards, but inv addition to such,`it also provides means for producing the boards separate from their skirtings and in such convenient form that the board and the skirting may be cemented or otherwise conveniently Vcombined together and thus form one unit.

The form of mold illustrated by Figures 1-3 7 is adapted for making left hand draining .boards with all parts integral, whereas the mold illustrated in Figures l and 5 isfor inak- ,ing a board -without the skirtings, the skirtings being separately made and subsequently i cemented, or otherwise conveniently joined inposition to form a complete board unit;

the molds being adaptable, as hereinafter described to forni either right or left hand boards; whereas the modilied form of apparatus illustrated in Figure 9, is capable of producing boards right, left or central or even handed with all skirtings and edgings molded integral therewith. f

Referring now to Figures 1 to 3 the numerals 20-21, represent respectively the top and bottoni dies of the mold, which, are made of metal, as also are all other parts of the apparatus. In order to accommodate the mold to the manufacture of boards with various size and shape sink openingsor wells detachable sections 23, 22, are secured to the main top and bottom portions respectively by means of the screwsor studs 25, suitable lugs 24, being formed on' the lower part of the main mold for convenience of attachment and the detachable sections 22, 23,*being of various sizes and shapes to forni various openings. lt will be seen that when the upper and lower molds are registering together as illustrated, cavities or spaces 31, 32, 33, 3'?, 50 are formed which serve to receive and retain a layer of the plastic rubber so that when the mold is subjected to pressure and heat such rubber will be molded and pressedv to shape inconformity with the contour of these cavities. The cavity 31 will thus form the back skirting; cavity 37 the end skirting, cavity 26 the lip or sink skirting. rilhe cavities 32-33 form the skirting that covers any framing while the main cavity 50 between the two mold portions 'forms the flat or table-like surface 'of the board. Raised beads 27" are formed on or attached' te the surface of the main upper mold in order to forni the customary drainage grooves and the top and bottom molds are made to register one with the other by means of the dowel pins 28. Y

Referring now to Figures it, 5, which illustrate mold for forming boards with wall skirtings separate instead yof integral therewith, it will be seen that the main'parts of such mold are identical with those hereinbefore described in reference to Figures 1-3, but that the recesses or cavities 31-37 are absent. it will be seen 'that recess 34 extends on three sides of the mold for receiving rec-` tangular bars 35 held in the upper mold by pins or set screws the 'function of suoli bars being to forni a longitudinal groove or depression on the edge of the upper surface of the molded board suoli groove serving to receive the wall skirtiiigs which are formed as separate pieces and joined to the board by suitable cement. lt will also be seen that the cavities 32 and 33 for receiving the skirting thatcovers the framing extend completely around the mold; and loose metal bars 54 edgings on onlyy such sides as desiredgfuiioo ` molds to 'form flanges for the board.

`with horizontal surface beads for forming yWell and a mold for forming a rubber skirting for one side and one end of the draining board, said slnrting being adapted to be secured by cement or other means to the rubber sink draining' board.

7. In the production of rubber 'draining boards arnold having a skirting cavity at one end and a horizontal cavity and a bar which closes the skirt-ing cavity against the flow of the heated rubber thus directing` the rubber horizontallT alongl cavity to produce a rubber draining board Without skirting substantiallyY as described.y

8. In the production of rubber draining `boards of the character described a mold having cavities and recesses, tWo bars in the re- Leazee cesses for determining the shape of the cavities, and a bar closing the recess that holds said bars thus directing the heated rubber along the cavitT for the purpose of forming the table portion of the rubber draining board substantially as described.

9. In a mold 'for molding drain boards of rubber or the like, two superimposed mold members having interchangeable and apertured sections, and means for att-aching said Sections to the mold members one above the other with their apertures registering, Whereby drain boards With drain openings or Wells of various sizes and shapes can be made.

10. Means for molding drain boards of rubber or the like, comprising two mold members, said members having means for forming the band with or Without marginal flanges, with drain grooves, and with sink openings'or Wells of various sizes and shapes.

In Witness whereof, the said JAMES PAUL HARKIN. has hereunto set his hand this 2nd day of June, 1926.

JAMES PAUL HARKN. 

